Test instrument



FIG. 1 is a perspective view of the test instrument;

FIG. 2 is back side view thereof;

FIG. 3 is bottom view thereof, wherein the feature shown in broken line forms no part of the claimed design;

FIG. 4 is front side view thereof;

FIG. 5 is left side view thereof;

FIG. 6 is right side view thereof; and,

FIG. 7 is top view thereof. 

CLAIM The ornamental design for a test instrument, as shown and described. 